SSANGYONG KORANDO 2013 Service Manual

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1. AIR BAG SYSTEM OVERVIEW
The air bag system is divided into front air bag system and side air bag system. The system protects the
occupant's body by deploying the air bags in the event of a collision. The system consists of 8 inflators
including the inflators of the seat belt pretensioners, air bag unit (SDM), and 4 impact sensors on the
front side and both sides of the vehicle. The air bag unit (SDM) determines the operation of each air bag
module and seat belt pretensioners using the crash signals from the front and side impact sensors in the
event of a collision. The front and side air bag systems are operated independently, and the body control
module (BCM) activates the auto door unlock function and various lamps including hazard warning lamp
and room lamps, when the crash signal from the SDM is received to notify others of emergency situation
and let the occupant escape easily. The SDM is equipped with self diagnosis function, and it performs
the diagnosis on the internal/external devices of the air bag system for a certain period of time after IGN
ON. And it monitors the air bag system regularly and turns on the air bag warning lamp on the
instrument cluster when a fault is found in the system, to notify the driver. The SDM has event data
recorder (EDR) function that stores the driving information data transmitted through CAN communication
from various units (vehicle speeds, engine rpm, brake application, etc.) in a crash or near crash event,
when the acceleration sensor in the air bag unit detects a sharp acceleration change, regardless of the
air bag deployment

Driver air bag
The air bag is installed at the center of the
steering wheel. The inflator of this air bag is
ignited momentarily in the event of a collision
and deploys the air bag cushion.
Air bag unit (SDM)
The air bag unit is installed in
the front side of the front
console, and it monitors the
air bag system and
determines the air bag
deployment in the event of a
collision.Front impact sensor
The front impact sensors are fitted
at the bottom of both LH and RH
headlamp inside the front
bumper, and output signals that
activates the front air bag system.
Air bag warning lamp
This lamp notifies the driver about the result of the
diagnosis and faults.
Passenger air bag
This air bag is installed in the upper side
of the instrument panel on the
passenger side. It activates in the same
way of the driver air bag.
2. AIR BAG SYSTEM LAYOUT
Passenger Air Bag ON/OFF Switch
The front passenger air bag is disabled (not
inflatable) when placing the passenger air bag
switch is located on the right side of the
instrument panel, and you can see it when
opening the front passenger door. Press and
turn this switch to operate.

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Side air bag
The side air bags are installed in the
outer sides of the driver (LH) and
passenger (RH) seats to minimize
occupants' side injuries in case of a side
impact. This air bag is operated based
on the collision signal from the side
impact sensor.
Curtain air bag
The curtain air bags are installed to the upper end of
both doors. The air bag provides head protection for
the front and rear outboard occupants in a side
collision.Side impact sensor
The side impact sensors are fitted at the
bottom of both LH and RH B-pillars, and
output signals that activates the side air
bag system.
BCM (Crash signal)
The BCM activates the auto door
UNLOCK, hazard warning lamp, and
room lamps when a crash signal of the
air bag unit (SDM) is input.Seat belt pretensioner
The seat belt pretensioners of all seats are
operated at the same time, in the event of a
collision. They pull the seat belt and holds the
occupants in the seat to minimize the impact.

3. AIR BAG SYSTEM OPERATING PROCESS
1) Air Bag System Input/Output
The air bag unit (SDM) performs the internal/external diagnosis on the air bag system for about 6
seconds after IGN ON. The air bag unit is ready to deploy air bag after this diagnosis, and when a
certain level of collision occurs, it determines the deployment of the air bag using the signals from the
impact sensors, deploys the corresponding air bag, and stores the collision data and EDR data. The
body control module (BCM) activates the auto door unlock function and various lamps including hazard
warning lamp and room lamps, when the crash signal from the SDM is received to notify others of
emergency situation and let the occupant escape easily.
Major functions
Detects frontal and side collision (Rear-end collision only with EDR trigger)
Activates the front air bag, side air bag, curtain air bag and belt pretensioners
Indicates system readiness and faults to the driver by means of a fault warning lamp
Facilitates servicing capability via a serial diagnostic communication interfaces
Records crash data and DTCs
Keeps power for deployment of air bag even when the power to the air bag unit is cut off due to the
collision
Event data recorder (EDR) -
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The front air bags and side air bags are activated independently according to the area and amount of
an impact.

The air bag will be deployed when:
The air bag can be deployed when:
the impact or type of a frontal collision is too much for the seat belt to protect the occupant. -
a collision to diagonal direction (not a frontal collision) occurs or the vehicle tips over.
a minor collision which the air bag sensor cannot detect occurs (impact is lower than that of
operating condition).
a collision against narrow objects, such as a telegraph pole or a tree, occurs.
the vehicle goes into a drainage or a puddle.
the vehicle wedges under a truck or a trailer or collides with the underbody of a heavy-duty
vehicle.
the hood is hit by falling stones.
the air bag warning lamp is on. -
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-the vehicle rolls over or tips over sideward, or a side/rear collision occurs.
the impact of the collision is low enough for the seat belt to protect the occupant properly. -
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The air bag will be hardly deployed when:
2) Front Air Bag System Operating Process
(1) Front air bag system deployment conditions
there is underbody impact from the road surface, impact against the curb at a very high speed, or
dropping impact onto the road surface with a large angle. -
The air bag will not be deployed when:
(2) Front air bag system deployment
When a collision occurs the air bag unit receives the signal from the front impact sensor and ignites the
front air bag to deploy the driver and passenger air bags and seat belt pretensioner.
Item Impact to (front)
Driver air bag Ignite
Passenger air bag Ignite
Seat belt pretensioner - Driver side Ignite
Seat belt pretensioner - Passenger side Ignite
(3) Component change after deployment
Air bag unit and its wirings (including connectors), seat belt pretensioner and its wirings (including
connectors), all front air bags, instrument panel, front impact sensor and other damaged components

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The air bag will be deployed when:
The air bag can be deployed when:
a severe oblique collision occurs with a specific severity, angle, speed, and position. -
a collision with oblique impact to the front seat direction or a frontal collision to the diagonal direction
occurs.
a frontal or rear collision occurs.
the vehicle rolls over or tips over sideward with a minor impact.
the air bag warning lamp is on. -
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-the vehicle is stationary or a frontal collision occurs at low speed.
a rear collision occurs.
the impact of the collision is low enough for the seat belt to protect the occupant properly. -
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The air bag will be hardly deployed when:
3) Side Air bag System Operating Process
(1) Side air bag system deployment conditions
the vehicle rolls over or tips over sideward with a severe impact.
the vehicle is stationary or a frontal collision occurs at low speed.
a rear collision occurs.
the impact of the collision is low enough for the seat belt to protect the occupant properly. -
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The air bag will not be deployed when:

(2) Side air bag system deployment
The side air bag system is activated in the event of a left side or right side collision. The seat side air bags
are installed to the driver and passenger seat (one on each seat) and the curtain air bags are installed in
the end of the roof located on the upper sides of both doors. The side air bags and the curtain air bags are
operated by the same signal. The air bags of the driver seat and passenger seat are operated separately
according to the impact position (left side, right side).
ItemImpact to (side)
LH RH
Side air bag - Driver side Ignite Not ignite
Side air bag - Passenger side Not ignite Ignite
Curtain air bag - Driver side Ignite Not ignite
Curtain air bag - Passenger side Not ignite Ignite
Seat belt pretensioner - Driver side Not ignite Not ignite
Seat belt pretensioner - Passenger side Not ignite Not ignite
(3) Component change after deployment
Side air bag deployed
Deployed side air bag, air bag unit and its wirings (including connectors), side impact sensor, other
damaged trim, seat components
Curtain air bag deployed
Deployed curtain air bag, air bag unit and its wirings (including connectors), side impact sensor,
damaged trim, seat and roof headlining

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General deployment of air bag
3) Deployment Procedure
Air bag cover (opening section)
Air bag cushion
Vent hole
Inflator
Filter
Ignition
Gas generator In general, the air bag unit transmits the ignition current to the ignition device of the corresponding air bag
inflator when a collision signal from the impact sensor is sent to the air bag unit
When the ignition device of the inflator is ignited, the gas generator generates nitrogen gas by being
burned, and this gas inflates the air bag cushion through the filter. The nitrogen gas used to inflate the air
bag exhausts through the vent hole immediately.
Cross section of driver air bag
Cross section of inflator